Thumb insertion portion of a baseball mitt



FIG. 1 is a front elevational view of a thumb insertion portion of a baseball mitt showing a first embodiment of my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a perspective view thereof;

FIG. 7 is a front elevational view thereof showing a second embodiment of my new design;

FIG. 8 is a rear elevational view thereof;

FIG. 9 is a right side elevational view thereof;

FIG. 10 is a left side elevational view thereof;

FIG. 11 is a bottom view thereof; and,

FIG. 12 is a perspective view thereof.

The broken-lines showing the environmental parts of the thumb insertion portion in the figures are for illustrative purpose only, and form no part of the claimed invention. The broken-lines appearing in the thumb insertion portion illustrate the stitching provided thereon. 

The ornamental design for the thumb insertion portion of a baseball mitt, as shown and described. 